The clay is not fighting you. It is following the disagreement between your hands — and the fix starts at the floor, not the fingers.
Every term somebody arrives at the studio and asks how to centre "properly", and every term the answer is the same: stop trying to win. The clay is not resisting you. It is doing what a plastic material does when two hands disagree, which is to wander off the axis and take the pot with it.
Centring is the first thing I teach and the last thing most people master. It is also, quietly, the least impressive-looking part of throwing. There is no shape to admire and no rim to pinch, only a hump of clay, a spinning wheel and a pair of hands applying a pressure that looks like nothing at all from the doorway.
Speed is a tool, not a measure of skill
The wheel goes fast for centring and slow for opening. Beginners do the reverse, mostly because speed feels like progress. A wheel turning at full tilt while the clay is still off-centre simply throws the wobble further out; you chase the fault around the head instead of removing it.
I set the wheel to a fast walking pace and no faster. Fast enough that the clay moves under the hand in a steady stream, slow enough that I can see the seam of the hump and follow it. When the clay comes true the speed can drop, because the work of the hands gets easier, and it is at that moment that most people stop paying attention.
Where the pressure actually comes from
Not from the fingers. The fingers are only the last centimetre of a line that starts at the floor. Left elbow braced against the left thigh, heel of the hand on the clay, forearm locked, body tipping in from the hip. The right hand comes over the top and meets the left, and the two of them squeeze the hump towards the centre line while the wheel does the rest.
If the elbow is floating, the hand follows the clay instead of guiding it. If the wrist is bent, the pressure becomes a push and the hump leans away. A teacher of mine used to say that centring is a posture, not a grip, and it took me three years to hear what she meant.
The cone, and why we do it
Coning up and down is not a warm-up. It lines the particles up, works out the last pockets of air and gives the hand a chance to feel where the clay is dense and where it is soft. Three passes, barely higher than a hand's width. A tall dramatic cone is mostly showing off, and it strains the base in a way that comes back later as an S-crack across the foot.
The down stroke matters more than the up. It is where the clay is compressed against the wheel head and where a beginner's grip usually loosens. Come down slowly, with the heel of the hand, all the way to the batt.
Signs you have not centred
The rim drifts when you lift a finger. The wall thickens on one side as you pull. The piece sighs and leans the moment the wheel stops. Any of these is a reason to take the hump down and start again, and starting again is not failure. It is twenty seconds against a pot that will not sit flat for the rest of its life.
When it is right, the clay goes quiet under the hands. There is a hum, a faint tackiness, and nothing else. That quiet is the whole aim, and it is worth all the tries it takes to find.